Tone-controlling horn support



S e t. 9, 1924. 1,so7,797

B. R. SEABROOK TONE CONTROLLING HORN SUPPORT Filed seni. s. 1921 I z 9 Jo .i.//

Patented Sept. 9, 1924.

UNITED STATES BAGSTER ROADS SEABROOK,

OF MISHAWAKA, INDIANA,

TONE-CONTROLLING HORN V SUPPOR'L Application filed September To all whomit 'may oo'cem:

Be it known that I, BAGSTER ROADS SEA- BROOK, a citizen of the Dominionof Canada, residing at Mishawala, in the county of St. Joseph and Stateof Indiana, have .invented certain new and useful Improvements inTone-Controlling Horn supports, of which the following is aspecification.

My invention relates to improvements in tone controlling horn supportsand it more especially comprises the features hereinafter pointed out inthe annexed claims.

The purpose of my invention is to provide a tone controllng support thatis located at a point on the neck of the horn which receives the firstimpact of passing sound waves as they issue from the tone arm; thatinsures rigidity of the horn not otherwise attainable; that overcomesmodi fying horn vibrations; that admits of free amplifications withoutincurring vibrations set up by the natural periodicity of the hornitself.

T Vith these and other ends in View, I illustrate in the accompanyingdrawing such instances of adaptation as will disclose the broadunderlying features without limitng myself to the specific details shownhereon and described herein.

Figure 1 is a side elevation partly in section of a phonograph horn inits associative relation to its supports, etc.

Fig. 2 is a front elevation of Fig. 1 partly in section.

Fig. 3 is a view similar to Fig, 1 showing an alternative under-saddle.

Fig. 4 is a front elevation of the salient features of Fig. 3.

Fig. 5 is an enlarged elevaton partly in section, of a tone-controladjustment.

This invention is a broad continuation of the disclosure made in SerialNumber 473,-

of May 28, 1921.

The structure shown in the accompanying figures in its accessoryrelation is largely snggestve, as it is immaterial in what specific kindof a cabinet the invention is installed. As instanced, 1 represents thehorn, which in my inventions I have found desirable to construct thesame of an inert self-setting, non-absorptive and non-resonantcomposition, so that the sound waves emanating from the usual recordwill be delivered from the horn without the imposi- 3, 1921. Serial No.498387.

tion thereon of the natural periodicity of the horn itself. Even whenthe horn is made very heavy, the impact of sound waves at the point 3 ofthe neck 2 will set up modifying vibrations.

To overcome such stray vibrations, I place a support 7 beneath theneclr. It may be made of laminations as shown in Fig. 1 or adjustable asshown in Figs. 3 and 4. The horn is secured to the back L of the cabinetby means of a suitable bracket 9 and screws or bolts which pass throughside ears 10. The tone arm, record, etc., are shown above the motorboard 5. These parts may be of any desired type, but I find superiorresults When they are coordinated with my present invention and othercopending applications, though I do not herein limit myself to anyspecific form of tone arm, sound box, etc.

In addition I do not limit myself to any particular sources of soundvibrations as the phrase In a talking machine used in the claimsbasically includes either a mechanical acoustical or electrical sourceof vibration, because the invention is equally adapted to these and anyother available sources.

The horn compartment may be between the horizontal partition 6 and themoto] board 5. The tone modifying support T has side ears 8 by means ofwhich it is secured to the partition 6, as eXemplified in Figs. l and 2;or is Suspended from the motor board 5 as shown in Figs. 3 and i bymeans of long bolts 14. In this latter form the support 11 is alsocurved to the cross section of the horn neck similar to the support orunder-saddle 7 This part 11 has slots 12, in side extensions, throughwhich the rods 14 pass loosely as they continue downward through holesin the cross member 13. These bolts are held by nuts 15, either abovethe motor board 5 or below the cross member 13 as may be desirech Inorder that the under-saddle can be adjusted, two adjusting screws 16 areprovided. These have a plain stern 17 and a threaded stem 18. The latterenters a threaded hole 19 in the cross member 13 and the ends 17 seat inholes formed on the underside of the saddle 11. In this way the upwardpressure of the support can be vared, at will, against the horn as it issupported on the bracket 9 thus overeomboard, an amplfyng horn, meansfor suping anytendency to orgnatd spurous portng the small end thereofon the case vbratons inthe h'orn itself; ndepndently of the motor board,supportv What I Clams: V ing means depending from the motor board 15`5 1. In a talking machine, a ease, a horn opposte the curved end of thehornand Secured to the rearwall of the case, a motor' means cooperatngWth the said support board above the horn and a support adaptadapted tosubject the neek of the horn to ed to engage the undersdeof the horn atvarble pressure as desred. the neck said support being Suspended fromIntestmony Whereof I afi'iX my sgna- 20- 10 the motor board. tur'e. u

2. Intalkng mechnes,-a case, a motor BAGSTER ROADS SEABROOK.

